<template>
  <!-- eslint-disable -->
  <div>
     <!-- 面包屑导航区 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>     
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert show-icon :closable="false" title="注意:只允许为第三级分类设置相关参数" type="warning"></el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类: </span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
          v-model="selectedCateKeys"
          :options="catelist"
          :props=" cateProps "
          @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" type="card" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加参数的按钮 -->
          <el-button @click="addDialogVisible=true" :disabled="isBtnDisabled" type="primary" size="mini">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableDate" border stripe>
              <!-- 展开行 -->
              <el-table-column type="expand">
                  <template slot-scope="scope">
                      <!-- 循环渲染tag标签 -->
                    <el-tag @close="handleClose(i, scope.row)" closable :key="i" v-for="(item, i) in scope.row.attr_vals">
                        {{item}}
                    </el-tag>
                    <!-- 输入的文本框 -->
                    <el-input class="input-new-tag" v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"ref="saveTagInput"size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)">
                    </el-input>
                    <!-- 添加的按钮 -->
                    <el-button v-else class="button-new-tag" size="small"
                     @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
</el-table-column>
<!-- 索引列 -->
<el-table-column type="index"></el-table-column>
<el-table-column label="参数名称" prop="attr_name"></el-table-column>
<el-table-column label="操作">
    <template slot-scope="scope">
                    <el-button @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button @click="removeParams(scope.row.attr_id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                  </template>
</el-table-column>
</el-table>
</el-tab-pane>
<!-- 添加静态属性的面板 -->
<el-tab-pane label="静态属性" name="only">
    <!-- 添加属性的按钮 -->
    <el-button @click="addDialogVisible=true" :disabled="isBtnDisabled" type="primary" size="mini">添加属性</el-button>
    <!-- 静态属性表格 -->
    <el-table :data="onlyTableDate" border stripe>
        <!-- 展开行 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
              <el-tag @close="handleClose(i, scope.row)" closable :key="i" v-for="(item, i) in scope.row.attr_vals">
                  {{item}}
              </el-tag>
              <!-- 输入的文本框 -->
              <el-input class="input-new-tag" v-if="scope.row.inputVisible"
              v-model="scope.row.inputValue"ref="saveTagInput"size="small"
              @keyup.enter.native="handleInputConfirm(scope.row)"
              @blur="handleInputConfirm(scope.row)">
              </el-input>
              <!-- 添加的按钮 -->
              <el-button v-else class="button-new-tag" size="small"
               @click="showInput(scope.row)">+ New Tag</el-button>
                      </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="属性名称" prop="attr_name"></el-table-column>
        <el-table-column label="操作">
            <template slot-scope="scope">
              <el-button @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button @click="removeParams(scope.row.attr_id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            </template>
        </el-table-column>
    </el-table>
</el-tab-pane>
</el-tabs>
</el-card>

<!-- 添加参数的对话框 -->
<el-dialog @close="addDialogClosed" :title="'添加' + titleText" :visible.sync="addDialogVisible" width="50%">
    <!-- 添加参数的对话框 -->
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
</el-dialog>

<!-- 修改参数的对话框 -->
<el-dialog @close="editDialogClosed" :title="'修改' + titleText" :visible.sync="editDialogVisible" width="50%">
    <!--修改参数的对话框 -->
    <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
</el-dialog>
</div>
</template>


<script>
    export default {
        data() {
            return {
                // 商品分类列表
                catelist: [],
                // 级联选择框的配置对象
                cateProps: {
                    expandTrigger: 'hover',
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children'
                },
                // 级联选择框双向绑定到的数组
                selectedCateKeys: [],
                // 被激活的页签的名称
                activeName: 'many',
                // 动态参数的数据
                manyTableDate: [],
                // 静态属性的数据
                onlyTableDate: [],
                // 控制添加对话框的显示与隐藏
                addDialogVisible: false,
                // 添加参数的表单数据对象
                addForm: {},
                // 添加表单的验证规则对象
                addFormRules: {
                    attr_name: [{
                        required: true,
                        message: '请输入参数名称',
                        trigger: 'blur'
                    }, ]
                },
                // 控制修改对话框的显示与隐藏
                editDialogVisible: false,
                // 修改的表单数据对象
                editForm: {},
                // 修改表单的验证规则对象
                editFormRules: {
                    attr_name: [{
                        required: true,
                        message: '请输入参数名称',
                        trigger: 'blur'
                    }, ]
                },

            }
        },
        created() {

            this.getCateList()
        },
        methods: {
            // 获取所有商品分类
            async getCateList() {
                const {
                    data: res
                } = await this.$http.get("categories")
                if (res.meta.status != 200) {
                    return this.$message.error("获取分类失败")
                }
                this.catelist = res.data
                console.log(this.catelist);
            },
            // 级联选择框选中变化,会触发这个函数
            handleChange() {
                this.getParamsData()
            },
            // 这是tab页签点击事件处理的函数
            handleTabClick() {
                console.log(this.activeName);
                this.getParamsData()

            },
            // 获取参数的列表数据
            async getParamsData() {
                // console.log(this.selectedCateKeys);
                // 说明选中的不是三级分类
                if (this.selectedCateKeys.length != 3) {
                    this.selectedCateKeys = []
                    this.manyTableDate = []
                    this.onlyTableDate = []
                    return
                }
                // 证明选中的是三级分类
                console.log(this.selectedCateKeys);
                // 根据所选分类的id和当前所处的面板获取对应的参数
                const {
                    data: res
                } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: {
                        sel: this.activeName
                    }
                })
                if (res.meta.status != 200) {
                    return this.$message.error("获取参数列表失败")
                }

                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals ?
                        item.attr_vals.split(" ") : [];
                    // 控制文本框的显示与隐藏
                    item.inputVisible = false;
                    // 文本框中输入的值
                    item.inputValue = ''
                })
                console.log(res.data);
                if (this.activeName == 'many') {
                    this.manyTableDate = res.data
                } else {
                    this.onlyTableDate = res.data
                }
            },
            // 监听添加对话框的关闭事件
            addDialogClosed() {
                this.$refs.addFormRef.resetFields()
            },
            //点击按钮添加参数
            addParams() {
                this.$refs.addFormRef.validate(async valid => {
                    if (!valid) return
                    const {
                        data: res
                    } = await this.$http.post(`categories/${this.cateId}/attributes`, {
                        attr_name: this.addForm.attr_name,
                        attr_sel: this.activeName
                    })
                    if (res.meta.status != 201) {
                        return this.$message.error("提那家参数失败")
                    }
                    this.$message.success("添加参数成功")
                    this.addDialogVisible = false
                    this.getCateList()
                })
            },
            // 点击按钮展示修改的对话框
            async showEditDialog(attr_id) {
                // 查询当前参数的信息
                const {
                    data: res
                } = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {
                    params: {
                        sttr_sel: this.activeName
                    }
                })
                if (res.meta.status != 200) {
                    return this.$message.error("获取参数信息失败")
                }
                this.editForm = res.data

                this.editDialogVisible = true
            },
            // 重置修改的表单
            editDialogClosed() {
                this.$refs.editFormRef.resetFields()
            },
            // 点击按钮修改参数信息
            editParams() {
                this.$refs.editFormRef.validate(async valid => {
                    if (!valid) return
                    const {
                        data: res
                    } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
                        attr_name: this.editForm.attr_name,
                        attr_sel: this.activeName
                    })
                    if (res.meta.status != 200) {
                        return this.$message.error("修改参数失败")
                    }
                    this.$message.success("修改参数成功")
                    this.getCateList()
                    this.editDialogVisible = false
                })
            },
            // 根据id删除对应的参数项
            async removeParams(attr_id) {
                const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }).catch(err => err)
                    // 用户取消了删除
                if (confirmResult != 'confirm') {
                    return this.$message.info("已取消")
                }

                // 删除的业务逻辑
                const {
                    data: res
                } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
                if (res.meta.status != 200) {
                    return this.$message.error("删除参数失败")
                }
                this.$message.success("删除参数成功")
                this.getParamsData()
            },
            // 文本框失去焦点或者按下回车键都会触发
            async handleInputConfirm(row) {
                // console.log("ok");
                if (row.inputValue.trim().length == 0) {
                    row.inputValue = ''
                    row.inputVisible = false
                    return
                }
                // 如果没有return则证明输入了内容需要进行后续处理
                row.attr_vals.push(row.inputValue.trim())
                row.inputValue = ''
                row.inputVisible = false
                this.saveAttrVals(row)
            },
            // 点击按钮展示文本输入框
            showInput(row) {
                row.inputVisible = true;
                // 让文本框自动获得焦点
                // 当页面上元素被重新渲染以后才会执行的回调函数中代码
                this.$nextTick(_ => {
                    this.$refs.saveTagInput.$refs.input.focus();
                });
            },
            // 删除对应的参数可选项
            handleClose(i, row) {
                row.attr_vals.splice(i, 1)
                this.saveAttrVals(row)
            },
            // 将对attr_vals的操作保存到数据库
            async saveAttrVals(row) {
                // 需要发送请求,保存操作
                const {
                    data: res
                } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
                    attr_name: row.attr_name,
                    attr_sel: row.attr_sel,
                    attr_vals: row.attr_vals.join(" ")
                })
                if (res.meta.status != 200) {
                    return this.$message.error("修改参数项失败")
                }
                this.$message.success("修改参数项成功")
            }
        },
        computed: {
            // 如果按钮需要被禁用则返回true,否则false
            isBtnDisabled() {
                if (this.selectedCateKeys.length != 3) {
                    return true
                }
                return false
            },
            // 这是当前选中的三级分类的id
            cateId() {
                if (this.selectedCateKeys.length == 3) {
                    return this.selectedCateKeys[2]
                }
                return null
            },
            // 动态计算标题的文本
            titleText() {
                if (this.activeName == 'many') {
                    return '动态参数'
                }
                return '静态属性'
            }
        },
    }
</script>


<style lang="less" scoped>
    .cat_opt {
        margin: 15px 0;
    }
    
    .input-new-tag {
        width: 150px;
    }
    
    .el-tag {
        margin-right: 20px;
    }
</style>